Description: Virtual deduction proof of csbrng4939.
The following User's Proof is a Virtual Deduction proof completed
automatically by the tools program completeusersproof.cmd, which invokes
Mel O'Cat's mmj2 and Norm Megill's Metamath Proof Assistant. csbrng4939
is csbrngVD28988 without virtual deductions and was automatically derived
from csbrngVD28988.